I was surprised by how tricky it was to attach the display!
I just finished setting up the Core One and printed a few prints. Overall, it prints very good.
I’ve built many printers, including the MK2, MK3, and others, but I have to say—I’ve never had as much trouble with any of them as I did when installing the ribbon cable to the display on the Core One. That was the only assembly step required, but wow, it was a bit of a challenge.
If the ribbon cable was just one inch (about 25mm) longer, the installation would have been so much easier. Did anyone else struggle with this, or was it just me?
RE: I was surprised by how tricky it was to attach the display!
Although I do not have a Core One yet so cannot comment from experience, it doesn't seem to be mentioned in any of the reviews/unboxings/setups etc I've seen online. Just checking though - you are aware the metal bar it 'hooks' onto is removable and magnetic, which I assumed should have made the install easier?
--> MK4 - MK4S - MINI+ - MMU3 - Accelerometer Guide - BambuLab A1 Combo <--
RE: I was surprised by how tricky it was to attach the display!
Yes, I did take that off. Removing the bar made it easier to tighten the two screws, but it's the very short ribbon cable that was a little frustrating. No big deal, it's on now. I guess I was just frustrated last night. I hope that they lengthen the cable in the future. I like the printer enough to buy another one, but the next one will be a kit if for no other reason than to make it easier to install the display!
RE: I was surprised by how tricky it was to attach the display!
I completely agree - the ribbon cable needs to be slightly longer.
RE: I was surprised by how tricky it was to attach the display!
I full concur. It was very difficult to attach the xLCD to the cable because the cable was not long enough. I needed about 15 min :-(If it would be 2 cm longer it would be much much easier. Currently unnecessary difficulty...
RE: I was surprised by how tricky it was to attach the display!
In Joe Prusa's "It's just around the corner" blog post, he had mentioned that it was a last-minute change to let the user install the display -- due to the drop test results. Maybe the original assembly sequence was different (and more convenient), with the display side being connected and mounted first, and then the other end of the cable routed inside the frame?
In which case they might have neglected to change the cable specification to work well with the new sequence. Or maybe they already had a few thousand ready-made cables on the shelf...
RE: I was surprised by how tricky it was to attach the display!
I had to cut the cable fasters on the bottom to attach the display, the ribbon cable was simply too short otherwise.
RE: I was surprised by how tricky it was to attach the display!
Another +1 here for having a tricky time attaching the display cable. I considered cutting the zip ties holding the cable in place (and would then re-attach them after the display was attached) but I managed to get the display connected without resorting to that.
I imagine this would be a pretty simple thing for Prusa to correct for going forward.
RE:
Regarding cutting the zip ties … I did the same, but only cut one zip tie. It was still a little tricky even after doing that. I also made sure that the single black wire was routed under the ribbon cable as it seemed to get disconnected when it was routed above the ribbon cable during installation.
RE: I was surprised by how tricky it was to attach the display!
Agreed. Mine arrived yesterday. I had to basically plug everything in 'semi blindley' - so with the display up facing me - in order to have the cables fit. Took me a couple of minutes to realize the procedure as laid out in the guide would not work as the cables are indeed too short. Then another couple of minutes to get them squeezed in while not really seeing properly where to put them. As this is basically the only real assembly action you need to do, it is a pitty then that it is soo cumbersome.
RE: I was surprised by how tricky it was to attach the display!
Although I do not have a Core One yet so cannot comment from experience, it doesn't seem to be mentioned in any of the reviews/unboxings/setups etc I've seen online. Just checking though - you are aware the metal bar it 'hooks' onto is removable and magnetic, which I assumed should have made the install easier?
No, it didn't. Literally the first step in the install guide is to remove that magnet-attached bar. https://www.prusa3d.com/downloads/manual/prusa3d_manual_coreone_1_00_en.pdf page 13.
The cable is too short and that connector is probably the wrong choice, IMO. I've built PCs and other printers for over 30 years now and I've never had a ribbon cable connector need that much pressure to seat. I was positive I was going to break something, like one of the fragile little tabs, or crack the PCB. I went so far as to completely disassemble the display to test fit it and make sure I was doing it right. The plastic back cover is also so close to the connector that you can't make it fit without staying exactly on-plane with the pins, which is pretty difficult with the little cable slack provided.
RE: I was surprised by how tricky it was to attach the display!
I just set up my machine today. Basically leaned in and I had my head inside the machine and was looking at what I was doing upside down. I am small with little fingers.
RE: I was surprised by how tricky it was to attach the display!
Will be interesting to see whether its just as tricky when building your own kit, or whether they have taken feedback on board and refined the assembly slightly to provide more space, by maybe not installing a zip tie etc......
--> MK4 - MK4S - MINI+ - MMU3 - Accelerometer Guide - BambuLab A1 Combo <--
RE: I was surprised by how tricky it was to attach the display!
The assembly instructions (for the ready-built printer) now have a user comment, posted Feb 24th, that the cable was found to be longer in a recently received Core One. It seems that Prusa has listened and already fixed this little issue.
RE: I was surprised by how tricky it was to attach the display!
It seems that Prusa has listened and already fixed this little issue
That would be great. I really thought there was something wrong with my machine because I had such a hard time getting that stupid cable seated.
Formerly known on this forum as @fuchsr -- until all hell broke loose with the forum software...
RE: I was surprised by how tricky it was to attach the display!
Mine was a breeze to attach, I think they've definitely made the cable longer.
RE: I was surprised by how tricky it was to attach the display!
Confirm.
Ours, delivered February 27th, had a long enough cable. The whole assembly was done in a jiffy (okay, almost).
RE: I was surprised by how tricky it was to attach the display!
Received Core One yesterday. I was expected that display attachment will be tricky. After first try I found out that I just need to pull that cable out to get a few extra centimetres. Then it was smooth.
RE: I was surprised by how tricky it was to attach the display!
The cable should be short since it my experience with other printers, a longer cable causes loss of power, and the voltage can suddenly drop under the acceptable minimum that IC and LCD support, causing crashes, USB read or write failure.
Probably when assembling the kit, it is easier to install the cable, mount the LCD, and then route the cable till the CPU board. But if it is already assembled, may be a pain. So, forcing the LCD install on assembled printer could be a last moment change to preserve the LCD during shipping, and now the longer cable may be another last moment change to facilitate the installation.
As told, the Murphy laws are always there, and this small change in length may cause other strange issues (crash, usb write failure, and so on...) so people that have received the longer cable should keep it in mind, in case they will have strange issues, and then they could immediately spot the cause.
Regards
RE: I was surprised by how tricky it was to attach the display!
The cable should be short since it my experience with other printers, a longer cable causes loss of power, and the voltage can suddenly drop under the acceptable minimum that IC and LCD support, causing crashes, USB read or write failure.
Without stating any numbers on current consumption, input voltage, and cable length, this seems very speculative and theoretical. Yes, in principle longer wires mean higher resistance and inductance. But if increasing the cable length by a few cm (and less than 10%) would cause a problem, then the design would have to be very marginal from the start.